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Probing proton halo effects in the 8B+64Zn collision around the Coulomb barrier

Spartà, R. ; Di Pietro, A. ; Figuera, P. ; Tengblad, O. ; Moro, A. M. ; Martel, I. ; Fernández-García, J. P. ; Lei, Jin ; Acosta, L. and Borge, M. J. , et al. (2021) In Physics Letters B 820.
Abstract
Proton halo effects in the 8B+64Zn reaction at an energy around 1.5 times the Coulomb barrier have been studied at HIE-ISOLDE CERN using, for the first time, the only existing postaccelerated 8B beam. This, together with the use of a high granularity and large solid angle detection system, allowed for a careful mapping of the elastic angular distribution, especially in the Coulomb-nuclear interference region. Contrary to what is observed for the one-neutron halo nucleus 11Be on the same target in a similar energy range, the analysis of the elastic scattering angular distribution shows only a modest suppression of the Coulomb-nuclear interference peak, with no remarkable enhancement of the total reaction cross-section. Inclusive angular and... (More)
Proton halo effects in the 8B+64Zn reaction at an energy around 1.5 times the Coulomb barrier have been studied at HIE-ISOLDE CERN using, for the first time, the only existing postaccelerated 8B beam. This, together with the use of a high granularity and large solid angle detection system, allowed for a careful mapping of the elastic angular distribution, especially in the Coulomb-nuclear interference region. Contrary to what is observed for the one-neutron halo nucleus 11Be on the same target in a similar energy range, the analysis of the elastic scattering angular distribution shows only a modest suppression of the Coulomb-nuclear interference peak, with no remarkable enhancement of the total reaction cross-section. Inclusive angular and energy distributions of 7Be produced in direct reaction processes have also been measured. The comparison of these data with the results of theoretical calculations for the elastic and non-elastic breakup contributions indicate that both processes are important. Overall, the experimental data suggest a 8B collision dynamics at the barrier very different from the one of neutron halo nuclei, showing only modest effects of coupling to continuum. This behaviour can be interpreted as due to the presence of the additional Coulomb interactions halo-core and halo-target together with the presence of the centrifugal barrier felt by the valence proton of 8B. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Breakup, Elastic scattering, Halo nuclei
in
Physics Letters B
volume
820
article number
136477
publisher
Elsevier
external identifiers
  • scopus:85114958619
ISSN
0370-2693
DOI
10.1016/j.physletb.2021.136477
language
English
LU publication?
yes
id
8d8d803b-d00f-4c5c-9f4a-0fdd1864b4bc
date added to LUP
2021-08-30 11:08:28
date last changed
2023-11-23 06:56:14
@article{8d8d803b-d00f-4c5c-9f4a-0fdd1864b4bc,
  abstract     = {{Proton halo effects in the 8B+64Zn reaction at an energy around 1.5 times the Coulomb barrier have been studied at HIE-ISOLDE CERN using, for the first time, the only existing postaccelerated 8B beam. This, together with the use of a high granularity and large solid angle detection system, allowed for a careful mapping of the elastic angular distribution, especially in the Coulomb-nuclear interference region. Contrary to what is observed for the one-neutron halo nucleus 11Be on the same target in a similar energy range, the analysis of the elastic scattering angular distribution shows only a modest suppression of the Coulomb-nuclear interference peak, with no remarkable enhancement of the total reaction cross-section. Inclusive angular and energy distributions of 7Be produced in direct reaction processes have also been measured. The comparison of these data with the results of theoretical calculations for the elastic and non-elastic breakup contributions indicate that both processes are important. Overall, the experimental data suggest a 8B collision dynamics at the barrier very different from the one of neutron halo nuclei, showing only modest effects of coupling to continuum. This behaviour can be interpreted as due to the presence of the additional Coulomb interactions halo-core and halo-target together with the presence of the centrifugal barrier felt by the valence proton of 8B.}},
  author       = {{Spartà, R. and Di Pietro, A. and Figuera, P. and Tengblad, O. and Moro, A. M. and Martel, I. and Fernández-García, J. P. and Lei, Jin and Acosta, L. and Borge, M. J. and Bruni, G. and Cederkäll, J. and Davinson, T. and Ovejas, J. D. and Fraile, L. M. and Galaviz, D. and Halkjaer Jensen, J. and Jonson, B. and La Cognata, M. and Perea, A. and Sánchez-Benítez, A. M. and Soić, N. and Viñals, S.}},
  issn         = {{0370-2693}},
  keywords     = {{Breakup; Elastic scattering; Halo nuclei}},
  language     = {{eng}},
  month        = {{09}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters B}},
  title        = {{Probing proton halo effects in the 8B+64Zn collision around the Coulomb barrier}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2021.136477}},
  doi          = {{10.1016/j.physletb.2021.136477}},
  volume       = {{820}},
  year         = {{2021}},
}